Doorknob lock



J. NELSON.

'DOORKNOB L'OCK. APPLICATION FILED SEPT. 13, 1921.

4,422,467, rammed July 11, 1922 M INVENTOR.

an ATTORNEYS.

JOHN unison, or snrnenrosr, counnorrour.

DOORKNOB Lock.

meager,

Specification of Letters Patent.

Patented July 11, 1922.

Application filed September 13, 1921. Serial No. 500,426.

To aZZwiwm it may concern:

Be it lmown that I, JoHN NELSON, a citizen of the United States, and resident of Bridgeport, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Doorknobr Locks, of cation.

My invention relates to new and useful improvements in locks, of which the following is a specification, such as will enable those skilled in the art to which it appertains to make and use the same.

, The invention particularly relates to what is known as knob locks for door knobs wherein a tumbler key is employed by being inserted directly in the face of the knob which the following is a specififor operating the lock tumblers contained therein. It further includes night latch mechanism, whereby the spindle and the knobs upon the door may be locked from time to time as desired in a way to prevent the turning of the outside knob and the operation of the door latch, except with the aid of a key.

The object otthe invention is to simplify the construction and operation of locks of this class and to provide a substantial and durable form of lock mechanism which may be contained within one of the door knobs thereby requiring asmaller and less expensive lock for holding the door closed.

Fig. 1 shows a sectional elevation through a door and knob spindle provided with my improved lock mechanism;

Fig. 2 is a somewhat similar sectional view but with the knobs and connected mechanism in a slightly different position;

Fig. 3 shows a front elevation of a lock plate such as is designed to he used in con- 'nection with the lock of my present design;

Fig. & shows a central longitudinal section through the knob, lock mechanism and key for operating the same;

Fig. 5 is a cross sectional view through the pin or tumbler mechanism of the lock shown in F ig. 4.;

Fig. 6 is a longitudinal section of the opposite end of the spindle including its -ln1ob and night latch mechanism as shown in Figs. 1 and 2, and

1 Fig. 7 shows an end elevation of the spindle knob and collar mounted thereon.

Referring in detailto the characters of reference marked on the drawings, 10 represent, a part of a door, 11 a pocket formed therein to receivethe-latch bolt casing 12 and through which the spindle 13 is rotatably mounted, said latch bolt mechanism includes a toggle having a shouldered hole therethrough to receive the door spindle, it being obvious of course, that the latch bolt, not shown, in this instance would be operated in the customary way, by the rotation of the knob spindle and its connected toggle 14 which in turnoperates the latch bolt not shown. a

The inner end of the spindle 13 is provided with aseries of threaded holes 15 to receive the end of the set screw 16 seated in a hole of the shank 17 of the inside knob 18 whereby the latteris adjustably mounted on the end of the spindle, to adjustably attach it to doors of dilierent thicknesses. The other end portion of this spindle, is mounted to turn slightly in the shank 19 of the outer knob 20 and its end is connected to be oper ated by the lock in the knob as will later be explained. The shank of the knob 20 is provided with a lug 21 that is adapted to engage a socket 22 in the annular rim 23 of the outer plate 24:, said engagement being effective only when the outer knob and its shank are shoved in so that the end of the lug 21 becomes seated in the socket, which obviously serves to hold the knob against turning.

This longitudinal movement of the outside knob and shank carries with it the spindle and the inner knob. Said movement may be accomplished by either pressing or pulling upon either the outer or the which means comprises an adjustable sleeve 25 upon the shank 17 of the inner knob. The sleeve is provided with a spring actuated detent pin 26 having a head 27 upon its outer end, and whose innerend is adapted to engage either the shank 17 or the longitudinal slot 28 in said shank. This sleeve is itself provided with a longitudinal slot 29 to accommodate the head of the set screw 16 positioned in the knob shank and spindle upon which the sleeve is mounted for the purpose of holding the sleeve against rotation. When the detent pin is in engagement with the longitudinal slot 28 it serves to hold the sleeve in its forwardly adjusted position against the annular rim 30 of the inner door platefil and so as to retain the spindle in its inner adjusted position as shown in Figs. 1 and 6.

On the other hand if it is desired to leave the shank of the outer knob disengaged and free to be turned together with the spindle and inner knob, and without the assistance of a key. the said sleeve would be positioned out farther as shown in full lines in Fig. 2 and in dotted lines in Fig. 6 in which case the end of detent is positioned on the surface of the shank 17 The outside knob 20 includes a pocket 32- to receive the cylinder lock mechanism which may be secured to the knob in any suitable manner. This cylinder lock includes a casing 33 having an annular cylindrical body portion, end flanges 85 and 36, and bridge portions 37 and 38. This casing serves to support a rotatable key cylinder 39 mounted therein together with a series of lock pins 10,

a and a series of levers ll that are pivotally mounted side by side upon a pin 42 secured to the casing so that the upper end portion of the levers will cover the ends of the pins 40 in'the casing, by means of the springs 43 positioned in sockets of the bridge portions 37 and seated against the opposite ends of said levers so asto hold the forward ends down upon the outer endsof the pins. The series of pins 40 in the casing are all of uniform length while the pins 4:4: in the key cylinder vary to afford different combinations and are so proportioned that the relative length of the same and the width of the key at the particular point engaging the pins would be such as to insure the alignment of the outer end of the pins with the surface of the key cylinder when the key is inserted. This in turn would obviously shove the outer pins outward against the pin actuated levers so that the inner end of the pins would likewise register with the surface of the key cylinderin a way to permit the latter to be turned with the assistance of the key when the same is inserted. This key cylinder includes an attached plate 45 upon its inner end that holds the cylinder in position, and further includes a slot 46 in which one end of the link 4-7 is positioned, the other end of said link being positioned in the inner end of the before mentioned spindle 13 and whereby the latter is rotated for operating the door latch, through the operation offthe cylinder by the use of the key. o i

This end of the spindle is rounded and finished and flanged at 4:8 to turn about one quarter of a tu rn, in a hub member 49 that is secured to the casing by means of screws 50. The end 51 of the extended shank portion 19 of said hub being cut away as at 52 to accommodate a pin 53 seate'din the spindle and adapted to limit the movement of the same in respect to the outer knob, and viceversa. 1

The pin 53 seated in the spindle is adapted to limit the movement of the spindle to a quarter of a turn, as required to operate the latch bolt by the use of the key when inserted as shown in Fig. 4.

A collar 54 is fitted upon the rim 23 of the outer door plate and extends outward to cover the shank 19 of the, outer door knob and is provided with a lug 55 upon its inner wall to engage a notch 56 in the end portion of the shank of the ,outer knob so as to furtherlock the knob against turning when the same is shoved in as suggestedby Fig.1, thereby affording, together with the previously described lug 21 and socket therefor, a double locking means to hold the knob in a fixed position when the spindle and knobs occupy their innermost position.

Having thus described my invention what I claim and desire to secure by Letters Patent is:

1. In a lock mechanism ofthe character described, the combination of a knob spindle for operating a latch bolt, knobs mounted on the opposite ends of said spindle, a lock mechanism contained in one of said knobs including a casing, a sleeve extending into and forming a part of the knob shank, a

lock mechanism contained within the casing and'including a rotatable key cylinder, an adjustable collar mounted upon the other end of the spindle, and adapted to be set in or out to position the spindle in or out, and means for engagement with the outer knob to prevent its turning when the said spindle and knobs are in their inner position.

2. In a lock mechanism of the character described, the combination with alock casing, ofa knob spindle mounted therein and provided with knobs, one of said knobs being fixed to one end of the spindle and the other knob being rockably mounted upon the other end so as to allow of a limited independent movement of the knob of the spindle, means for holding theknob against rotary movement, lock mechanism within the outer knob including a casing, a look cylinder rotatably mounted withinthe oasing and adapted to be operated by a key, and means connecting the lock cylinder and knob spindle whereby the latter may be turned within the shank of the knob by the operation of the key cylinder. 1

3. Ina lock mechanism of the, character described, the combination with a casing, of a knob spindle mounted therein, a knob fixed to one end of the spindle, a knob rockably mounted upon the other end, means carried by the fixed knobto hold the knobs and spindles in an inner or outer adjusted 10 of the key cylinder.

position relative to this casing, means for Signed at Bridgeport, in the county of engaging the outer knob and holding it F airfield and State of Connecticut, this 30th against rotation when in an inner position, day of August, A. D., 1921. look mechanism Within the outer knob in- 5 eluding a casing and lock cylinder rotatably JOHN NELSON.

mounted Within the casing, and means connecting the lock cylinder and knob spindle 1 nesses' whereby the latter may be turned within JOHN WIKMAN, the shank of the outer knob by the operation ELEANOR C. WIKMAN. 

